Epoxy board 1,5mm, one-sided Cu 35µm, photo positive methodExposure times:30W UV tubes 60-90s1000W halogenl.
45-70s250W Nitraphot 12-15min500W Nitraphot 6- 7minwith approx.
30cm distance and max.
format 150x200.
Development times: at 25-30°C in 25-90s depending on the freshness of the bath.
Etching times: At freshly prepared ammonium persulfate bath of 40-50°C: 5-10min.